Valve.



M. J. WALSH.

VALVE.

APPLIGATION FILED Nov. 15, 1911.

Patented Feb. 11, 1913.

WIT/VESSES 4 through a s'rr s "raam" nnen.

.Mrcnnnnaosnrnwansn, or .MAHANOY CITY, PENNSYLVANIA.

y VALVE,

nosasae. S.1=.-2ifwat1m1ofmterslmnt Patented.friet.11,1913.'

' Applicationniea-Navember 15,1911, seriainaeos.

To all who/m t may concern.'

Be it known that I, MICHAEL J. WALsH, a citizen of the United States-and a resident of Mahanoy City, in the county of Schuyl-V kill and State of Pennsylvania, have invented a new and Improved Valve, off which the following is a full, clear, and exact description.

The object of the invention is to produce a blow-ofi" valve which is so constructed that 'the ,main valve and its valve seat may be cation, in which similar characters of reference indicate corresponding parts in all the views and 1n which- Figure 1` represents a vertical. section.

through a valve embodying the invention, with the parts in" normal Aoperative position; and Fig. 2 is a similar view with the main valve and its valve seat .are exposed for repairs. I i

In the drawing, 1 represents the valve casing or dome which has a usual inlet port 2 and a discharge port 3 leading to' a conduit pipe orc'onnection 5. The port 3Vis provide with a valve seat 6 which is formed upon theupper end of the pipe 5, which pipe enters the casing 1 through a st-uiing box 7, and through which it is freely movable for a purpose to'lbe hereinafter described. .In normal operation, the pipe 5 is in the position shown in Fig. 1, .andthe outlet port 3 is closed by means o-favalvecomprising the lower portion of the member 8 which has a beveled Seat-Q--arranged to closely t. and engage the beveled valve seat 6 at the upper en of the pipe 5.

As shown in the drawing, the member 8A is in the form of a cup open at its lower end, but closed by ato-p 10 at its upper end. The member 8 is swiveled loosely to the lower end of a valve stem 11, which has a head 120 fitted into Lthe under sideof av bushing 121, which has a threaded connection 122 with the recess in the top 10 of the member 8. The upper end of the bushing 121 is beveledas shown at 123 to t the beveled seat 124 at the under side of a boss 125 formed, uponY the4 inner surface of the casing 1. l.

The valve stem 11 has a threaded connection 12 with the cross head' 13, the said cross head being supported by rods 14 which have 'threaded portions 15, and which pass freely through ears 16 formedy integrally with the valve easingl. Atl its upper end,

the valve stem 11 carries al hand wheel 17 or other means whereby it 'may -bev turned, and through fthe, threaded connection 12, raise or lower the member 8 to connect or disconnect the valve seats 6 and 9 and the beveled parts 123 and 124. The member 8 is guided in its up and down movement by means of the guides 18 which consist of narrow metallic plates carried by a threaded sleeve 19 screwed into the opening in the l member 8, and which guides have a sliding connection with the pipe 5. The valve stem 11 passes through .the stuiing box 24at the j top of the casing 1.

The foregoing arrangement is such that with the parts normally ini the position A` shownin Fig. 1, the port 3 is openedloy closed by moving. the member 8 away from or toward the upper end of the pipe 5.

Should it be desired `to grind or otherwise repair the valve at the loweryend of the. memberr 8, which may be considered to be the main valve, the pipev 5 is` moved down y.ward in the stuiiing box 7 so as to bring itsl upper beveled end outside .of the stalling I box as shown in Fig. 2, and also thelower end of lthemain valve will project below the stuiing box. The pipe 5y is supported by `a cross-head 20 similar tothe cross-head 13,

the cross-head 20 being supportedupon the 95 lower ends of the rods 14. r The lower end of the vpipe 5 has a sliding movement in the stufling boxl 21 'connected Vto the conduit p4. The 'rods 14 carry nuts 141 threaded to the threaded portions15 of the rods 14 above and below the bearings for ears 16.. By

vmeans' of these nuts, the cross heads 13 and 20 and pipe 5 may be raised and lowered with relatlon to the casing 1, so as. to position thepipe. 5 either as shownrin'Figll for normal operation, or as shown in- Fig. 2 for a purpose to be hereinafter described. In

themovement of the pipe from the positionv shown in Fig. 1 tothatA of Fig. '2, there f* will be a 'Simultaneous --movement of the member S'Without disturbing their relative position to each other, and when moved to the position shown in Fig. 2, the valve seats l Gand 9 will be outside of the stufling box 7 whereby they may be reached for re airs.

In order to prevent leakage when t eparts are in the position shown in Fig. 2, the member 8 is provided with an auxiliary valve khaving a seat 22, carriedl by a flange at its.

upper end, which may be engaged with an auxiliary valve seat 23 formed inthe casing 1, as shown clearly in Fig. 2 of the drawing before any further movement of the parts takes place for the purpose of separating the valve seats 6 and 9 while outside of the casv ing. In this operation which, as has been before explained, is for the purpose of grinding or repairing the main valve, it is necessaryto simultaneouslyadjust the cross heads 13 and 20 and pipe 5 vertically with. respect to the casing 1, the stem 11 land the member -8. After the valve is closed by the auxiliary valve, as shown in Fig.' 2, the pipe 5 may be still further moved downward for the purpose of disconnecting the valve seats 6 and 9jand exposing them for. repair and grinding. 'Ifo restore the parts to their normal positlon, the valve seats 6 and 9 are first brought in close contact with each other, and thereafter the pipe 5- and the member 8, together v lng in engagement with its seat to close the with the cross-headsg- 13 and 20 are moved upwardly `to the position shown in Fig. 1. It will be observed thatthe auxiliary valve will prevent leakage if the main valve is exposed for repairs, the'auxiliary valve bevalve, and the valve seat at the end 'of the pipe can b e brought into engagement with the main valve to close the valve before -theJ member 8 is raised.' p, y

In the normal operation of the valve as lshovvn'in Fig. 1, the raising of. the member 8 to its extreme limit upwardly, connects., the beveled parts 123 and 124, asshown clearly in. Fig. l, -which eifectivelyinsures against leakage at the stuiiing box 24. A

' Having thus described my invention, I claim as new and desire to secure by Letters Patent:

' 1. A valve comprising a casing, a movable valve seat'fnormally in the casing, a station-` vary valve seat also within the casing, a member comprising a main valve for engagement withl said movable seat and an auxiliary valve for engagement with the' stationary seat, a stem having a, connection with 'said member for moving-the member into en' `gagement with, the movable'seat, and means for moving said movable seat I 2. A valve comprising a casingavalve seat movable from within to the exterior of the main valve which coperates 'with said movable seat and is movable to the exterior of the casing therewith, a stationary valve seat within the casing, said valve member iliary valve and being engageable with the stationary Seat/When the main valve is 1n.

said valve member and said movable seat.

Acarrying a valve seat on its inner end, means supporting said pipe from said casing and operable to move said pipe into and out of 'the casing whereby the valve seat on its formed about the opening through which the pipe moves, an auxiliary valve seat, a cross head supported bythe casing, a valve stem connected' tosaid cross-head, a valve face carried bysaid valve head coperating with the valve seat on the inner end o f said pipe, and an auxiliary valve face carried by auxiliary valve seat and suitable guides connected to the valve head and having a slid- 4. A valve comprising a casing, a pipe and provided with a 4main "valve seat at its inner end, a member movable in the casing and having a valve face for coperating vwith said valve seat, cross heads having consaid casing,said connections having means whereby the cross heads may be raised and said cross heads engaging the plpe, and a said cross heads and engaging the said memprovided with an auxiliary valve seat, and said member .being provided with an auxthe last-mentionedqseat.

In testimony .whereof'I have signed my namlto-this specification in the presence of two subscribing witnesses.v

f. MICHAEL JOSEPH WALSH.

Witnesses `JOHN J. SUMMERS, ,l

JOHN GOYNE.

its exterior position, andvmeans to moveM 3. A valvecomprising a casing, a pipe inner' end is moved, said casing having 75 head carried by said stem and supported in axial alinement withsaid plpe, a main valve said valve head and cooperating with said ing connection'with the pipe. 'f

having a slidingconnectlon with the casing nections passing through portions of the lowered in 'order to move the pipe, Aone Vof valve stem operating through the other of 100 ber. for moving the same,`sa1d casing being' iliary valve face adapted to coperate with 

